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　　Energy storage technology changes GE’s green battery idea

　　Many people hold used batteries and don’t know what to do with them? The concept that traditional lead-acid batteries are prone to lead pollution is deeply rooted in the hearts of the people, but there is no effective way to recycle them. Maybe you are optimistic about electric vehicles but worried about battery power? The instability and high price of lithium batteries, which are most commonly used in motor vehicles, have become bottlenecks hindering the popularity of electric vehicles.

　　Today, after 11 years of research and development and an investment of more than US$400 million, GE's sodium salt battery (Durathon) is being intensively produced at its factory in New York State, USA. This new type of battery, which is more environmentally friendly, more efficient and cheaper, has become GE's focus on R&D and commercialization. The star products promoted are striving to occupy a place among the fiercely competitive new power storage products.

　　This technology, which originated from the oil crisis in the 1980s, was reactivated by GE. Through the GE Global R&D Center, forty or fifty scientists from R&D centers in the United States, India, and China were integrated to continuously optimize the chemical reaction mechanism and materials, and in A breakthrough in commercialization was achieved in August 2012.

　　Green Battery Idea

　　Energy storage technology is an important technical support for the development of smart grids and plays a vital role in large-scale renewable energy access, user intelligence and interaction, and changes in traditional grid upgrade methods.

　　The sodium salt battery developed by GE can also be called a nano-nickel battery. The main raw materials are sodium chloride and nickel. The energy density of sodium salt batteries is twice that of traditional lead-acid batteries, and it can be deeply discharged more than 3,500 times. Its service life is 10 times that of lead-acid batteries.

　　Compared with traditional lead-acid batteries, sodium salt batteries do not produce waste gas and waste liquid during use. The assembly process also does not include the operation of heavy metal aqueous solutions and does not discharge toxic waste liquid. Therefore, there will be no heavy metal pollution caused by traditional battery factories, especially lead pollution. In addition, sodium salt batteries can be fully recycled through a process similar to traditional metal smelting. It can be said that the sodium salt battery is a green battery and has obtained GE Ecomagination certification from a third party.

　　Compared with widely used lithium batteries, sodium salt batteries have slightly higher energy density and cycle times than lithium batteries. Since raw materials are easy to obtain, they will have a cost advantage over lithium batteries after large-scale manufacturing. The current cost of lithium batteries is approximately US$600/kWh, and GE’s short-term goal is to reduce this to US$500/kWh. If the service life is taken into account, the cost of sodium salt batteries is even expected to compete with traditional lead-acid batteries, and the economy of the entire life cycle is stronger.

　　In addition, if applied to vehicles, ships and other means of transportation, sodium salt batteries do not have the danger of fire and explosion caused by lithium batteries, and nickel chloride itself can be used as a very good fire-extinguishing material. The performance of this battery will not be affected in environments ranging from -20°C to 60°C, and the intelligent battery management system can effectively prevent battery overcharging.

　　GE began investing in hybrid technology after 2000. The idea at the time was to provide more powerful and reliable power support for GE Transportation's mining vehicles, locomotives, ships and other products.

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